Two Models one form

Rails
1

I have setup a basic conference registration form. Within that form I
have an optional piece of information that would only be filled out if
the registrant was a vendor. Here is my relationship:

Registration has_one :vendor
Vendor belongs_to :registration

I want to be able to send both the vendor information and registration
information with the same form, but the vendor information might not be
sent if the registrant wasn’t a vendor. I have my fields set up for the
vendor but I don’t think they are right:

<%= select(“vendor”, “donation”, [[‘Door Prize’, ‘doorprize’],
[‘Monetary donation for door prize’, ‘monetary’], [‘Sponsor food
eventâ??breakfast ($700)’, ‘breakfast’], [‘Sponsor food eventâ??snack
($300)’, ‘snack’], [‘Sponsor food eventâ??dinner ($3000)’, ‘dinner’],
[‘Sponsor entertainment at dinner ($650)’, ‘entertainment’] ],
{:include_blank => true})%>

<%= select(“vendor”, “monetary_donation”, [[’$100’, ‘100’], [’$200’,
‘200’], [’$300’, ‘300’], [’$400’, ‘400’], [’$500’, ‘500’], [’$600’,
‘600’] ], {:include_blank => true})%>

<%= text_field ‘vendor’, ‘other’ %>

<%= check_box “vendor”, “electricity” %>

I get the error “Vendor expected, got String.” Do I need to manually
insert the vendor data in the controller? Like this:

@reg = Registration.new(params[:registration])
@reg.vendor.donation = params[:vendor_donation]
@reg.vendor.monetary_donation = params[:vendor_monetary_donation]
@reg.vendor.other = params[:vendor_other]
@reg.vendor.electricity = params[:vendor_electricity]

Or is there an easier way?

2

I could be wrong but I think you need to initialize a vendor. i.e:

@reg = Registration.new(params[:registration])
@reg.vendor = Vendor.new
@reg.vendor.donation =
etc…

-Adam

3

Oh, and for your other question you can do:

@reg.vendor = Vendor.new(params[:vendor])

and so long as your params hash is filled, that’ll work fine.

4

Does this relationship assume I have a registration_id field in my
vendors table?

I do and I think that is right but I can’t remember.

Yep.

-Adam

5

Adam B. wrote:

Oh, and for your other question you can do:

@reg.vendor = Vendor.new(params[:vendor])

and so long as your params hash is filled, that’ll work fine.

Does this relationship assume I have a registration_id field in my
vendors table?

I do and I think that is right but I can’t remember.

6

Will this not allow me to do validation on both models? It isn’t
picking up the validation on one of them.

Seth

I do believe that is because I am dumb. This is probably what you should
do:

@reg = Registration.new(params[:registration])
vend = Vendor.new(params[:vendor])
if vendor.save
@reg.vendor = vend
if @reg.save

else

end
else
<same as the else clause of the if @reg.save I believe>
end

Validation actually happens on save.

-Adam

7

Adam B. wrote:

Does this relationship assume I have a registration_id field in my
vendors table?

I do and I think that is right but I can’t remember.

Yep.

-Adam

Will this not allow me to do validation on both models? It isn’t
picking up the validation on one of them.

Seth